DP

David Perkins

AP Active Power: 10 patents #3 of 35Top 9%
Overall (All Time): #464,411 of 4,157,543Top 15%
11
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8671686 Systems and methods for providing backup energy to a load Joseph F. Pinkerton, David Beatty 2014-03-18
7918091 Systems and methods for controlling humidity Joseph F. Pinkerton 2011-04-05
7750518 Transient energy systems and methods for use of the same 2010-07-06
7693402 Thermal storage unit and methods for using the same to heat a fluid Robert S. Hudson, Donald M. Hudson, David Beatty, Donald Stamets, Joseph F. Pinkerton 2010-04-06
7681395 Systems and methods for providing backup energy to a load Joseph F. Pinkerton, David Beatty 2010-03-23
7425807 Transient energy systems and methods for use of the same James A. Andrews, Scott D Logan, Karl Schuetze, David A. Badger, Robert S. Hudson 2008-09-16
7127895 Systems and methods for providing backup energy to a load Joseph F. Pinkerton, David Beatty 2006-10-31
6955050 Thermal storage unit and methods for using the same to heat a fluid Robert S. Hudson 2005-10-18
6657320 Integrated flywheel uninterruptible power supply system James A. Andrews, David A. Badger, Robert L. Fuller, Jr., Randal A. Lee, James R. Pitt +1 more 2003-12-02
6642682 Circuits and methods for preheating a rotor of a motor-generator device Charles S. Richey 2003-11-04
6208056 Cartridge armatures for electro-dynamic machines 2001-03-27